SE9602402D0 - Improvements in, or relating to, orthogonal frequency division multiples systems - Google Patents

Improvements in, or relating to, orthogonal frequency division multiples systems

Info

Publication number
SE9602402D0
SE9602402D0 SE9602402A SE9602402A SE9602402D0 SE 9602402 D0 SE9602402 D0 SE 9602402D0 SE 9602402 A SE9602402 A SE 9602402A SE 9602402 A SE9602402 A SE 9602402A SE 9602402 D0 SE9602402 D0 SE 9602402D0
Authority
SE
Sweden
Prior art keywords
relating
frequency division
orthogonal frequency
division multiples
isi
Prior art date
Application number
SE9602402A
Other languages
Swedish (sv)
Other versions
SE518137C2 (en
SE9602402L (en
Inventor
Mattias Wahlqvist
Christer Oeberg
Roger Larsson
Original Assignee
Telia Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20403054&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=SE9602402(D0) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Telia Ab filed Critical Telia Ab
Priority to SE9602402A priority Critical patent/SE518137C2/en
Publication of SE9602402D0 publication Critical patent/SE9602402D0/en
Priority to EP97850081A priority patent/EP0814587A3/en
Priority to NO19972671A priority patent/NO324413B1/en
Priority to US08/877,160 priority patent/US6088398A/en
Publication of SE9602402L publication Critical patent/SE9602402L/en
Publication of SE518137C2 publication Critical patent/SE518137C2/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
    • H04L25/03834—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using pulse shaping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/26035—Maintenance of orthogonality, e.g. for signals exchanged between cells or users, or by using covering codes or sequences

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Power Engineering (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

The present invention is a method of increasing the maximum available bit rate on a single data link, in order to gain capacity within single cells. The method uses the fact that the pulse shaping introduces known inter symbol interference (ISI) and utilises the idea of overcoming ISI by equalization. <IMAGE>
SE9602402A 1996-06-18 1996-06-18 Pulse formation and equalization in multiple systems with orthogonal frequency division SE518137C2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SE9602402A SE518137C2 (en) 1996-06-18 1996-06-18 Pulse formation and equalization in multiple systems with orthogonal frequency division
EP97850081A EP0814587A3 (en) 1996-06-18 1997-05-22 Pulse shaping for multicarrier systems
NO19972671A NO324413B1 (en) 1996-06-18 1997-06-11 Orthogonal frequency divided multiplex system
US08/877,160 US6088398A (en) 1996-06-18 1997-06-17 Orthogonal frequency division multiplex systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9602402A SE518137C2 (en) 1996-06-18 1996-06-18 Pulse formation and equalization in multiple systems with orthogonal frequency division

Publications (3)

Publication Number Publication Date
SE9602402D0 true SE9602402D0 (en) 1996-06-18
SE9602402L SE9602402L (en) 1997-12-19
SE518137C2 SE518137C2 (en) 2002-09-03

Family

ID=20403054

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9602402A SE518137C2 (en) 1996-06-18 1996-06-18 Pulse formation and equalization in multiple systems with orthogonal frequency division

Country Status (4)

Country Link
US (1) US6088398A (en)
EP (1) EP0814587A3 (en)
NO (1) NO324413B1 (en)
SE (1) SE518137C2 (en)

Families Citing this family (23)

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Publication number Priority date Publication date Assignee Title
US7079584B2 (en) * 1998-08-10 2006-07-18 Kamilo Feher OFDM, CDMA, spread spectrum, TDMA, cross-correlated and filtered modulation
US6470055B1 (en) 1998-08-10 2002-10-22 Kamilo Feher Spectrally efficient FQPSK, FGMSK, and FQAM for enhanced performance CDMA, TDMA, GSM, OFDN, and other systems
US7133352B1 (en) * 1999-09-20 2006-11-07 Zion Hadad Bi-directional communication channel
US6074086A (en) * 1999-04-26 2000-06-13 Intellon Corporation Synchronization of OFDM signals with improved windowing
JP4284813B2 (en) * 2000-02-18 2009-06-24 株式会社デンソー OFDM receiver
US7827581B1 (en) * 2000-02-29 2010-11-02 BE Labs, Inc. Wireless multimedia system
US6396803B2 (en) 2000-06-29 2002-05-28 California Amplifier, Inc. Modulation methods and structures for wireless communication systems and transceivers
US6975585B1 (en) * 2000-07-27 2005-12-13 Conexant Systems, Inc. Slotted synchronous frequency division multiplexing for multi-drop networks
US7054375B2 (en) * 2000-12-22 2006-05-30 Nokia Corporation Method and apparatus for error reduction in an orthogonal modulation system
US7215715B2 (en) * 2001-02-06 2007-05-08 Maxim Integrated Products, Inc. System and method of signal wave shaping for spectrum control of an OFDM signal
US6882619B1 (en) 2001-02-21 2005-04-19 At&T Corp. Interference suppressing OFDM method for wireless communications
US7158474B1 (en) 2001-02-21 2007-01-02 At&T Corp. Interference suppressing OFDM system for wireless communications
US7020218B2 (en) * 2001-06-18 2006-03-28 Arnesen David M Sliding-window transform with integrated windowing
KR20030095725A (en) * 2002-06-14 2003-12-24 삼성전자주식회사 OFDM transmitter capable of transmitting OFDM symbols stably
DE10239810A1 (en) * 2002-08-29 2004-03-11 Siemens Ag Method and transmission device for transmitting data in a multi-carrier system
JP2004175052A (en) * 2002-11-29 2004-06-24 Sony Corp Medium to be recorded by ink jetting, ink jet imaging method, and printed matter
US7286620B2 (en) * 2003-09-17 2007-10-23 International Business Machines Corporation Equalizer for reduced intersymbol interference via partial clock switching
US7321550B2 (en) 2004-02-17 2008-01-22 Industrial Technology Research Institute Method of equalization in an OFDM system
US7296045B2 (en) * 2004-06-10 2007-11-13 Hasan Sehitoglu Matrix-valued methods and apparatus for signal processing
US7974358B2 (en) * 2006-05-03 2011-07-05 Industrial Technology Research Institute Orthogonal frequency division multiplexing (OFDM) encoding and decoding methods and systems
KR100752670B1 (en) 2006-08-25 2007-08-29 삼성전자주식회사 Ofdm system, symbol estimation apparatus and inter-carrier interference cancellation method for estimating symbol value using the output of forward error correction decoder
US8908796B1 (en) * 2013-05-15 2014-12-09 University Of South Florida Orthogonal frequency division multiplexing (OFDM) transmitter and receiver windowing for adjacent channel interference (ACI) suppression and rejection
DE102014213815A1 (en) * 2014-07-16 2016-01-21 Siemens Aktiengesellschaft Method for limiting an amplitude spectrum of signal components

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4881241A (en) * 1988-02-24 1989-11-14 Centre National D'etudes Des Telecommunications Method and installation for digital communication, particularly between and toward moving vehicles
KR0139527B1 (en) * 1988-10-21 1998-07-01 아르레뜨 다낭제 Transmitter, transmission method and receiver
GB9020170D0 (en) * 1990-09-14 1990-10-24 Indep Broadcasting Authority Orthogonal frequency division multiplexing
US5128964A (en) * 1990-10-10 1992-07-07 Intelligent Modem Corporation Modulation method and apparatus for multicarrier data transmission
FR2680061B1 (en) * 1991-08-02 1993-11-12 Thomson Csf METHOD OF TRANSMITTING A DIGITAL SIGNAL ACCORDING TO A MULTI-CARRIER MODULATION OF OFDM TYPE, TRANSMITTER AND RECEIVER FOR THE IMPLEMENTATION OF SAID METHOD.
US5295138A (en) * 1992-04-21 1994-03-15 Northwest Starscon Limited Partnership Apparatus and method for optimal frequency planning in frequency division multiplexing transmissions
US5285474A (en) * 1992-06-12 1994-02-08 The Board Of Trustees Of The Leland Stanford, Junior University Method for equalizing a multicarrier signal in a multicarrier communication system
US5416767A (en) * 1993-02-08 1995-05-16 U.S. Philips Corporation Method of transmitting a data stream, transmitter and receiver
SG48266A1 (en) * 1993-12-22 1998-04-17 Philips Electronics Nv Multicarrier frequency hopping communications system
US5790516A (en) * 1995-07-14 1998-08-04 Telefonaktiebolaget Lm Ericsson Pulse shaping for data transmission in an orthogonal frequency division multiplexed system

Also Published As

Publication number Publication date
SE518137C2 (en) 2002-09-03
US6088398A (en) 2000-07-11
NO324413B1 (en) 2007-10-08
NO972671L (en) 1997-12-19
EP0814587A2 (en) 1997-12-29
NO972671D0 (en) 1997-06-11
EP0814587A3 (en) 2001-02-28
SE9602402L (en) 1997-12-19

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